Hydrogen-induced low temperature CO displacement from the Pt(111) surface
dc.contributor.author | Parker, Deborah Holmes | en_US |
dc.contributor.author | Fischer, Daniel A. | en_US |
dc.contributor.author | Colbert, Jeff | en_US |
dc.contributor.author | Koel, Bruce E. | en_US |
dc.contributor.author | Gland, John L. | en_US |
dc.date.accessioned | 2006-04-10T13:35:33Z | |
dc.date.available | 2006-04-10T13:35:33Z | |
dc.date.issued | 1990-10-02 | en_US |
dc.identifier.citation | Parker, Deborah Holmes, Fischer, Daniel A., Colbert, Jeff, Koel, Bruce E., Gland, John L. (1990/10/02)."Hydrogen-induced low temperature CO displacement from the Pt(111) surface." Surface Science 236(3): L372-L376. <http://hdl.handle.net/2027.42/28358> | en_US |
dc.identifier.uri | http://www.sciencedirect.com/science/article/B6TVX-46SXTPJ-MC/2/9bef24161dc29d0052de9a1e3fbe1765 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/28358 | |
dc.description.abstract | A new low temperature displacement mechanism for CO on the Pt(111) surface has been observed in the presence of high pressures of hydrogen (0.001 to 0.1 Torr H2). Temperature-programmed fluorescence yield near-edge spectroscopy (TP FYNES) was used to continuously monitor the CO coverage as a function of temperature both with and without hydrogen. For hydrogen pressures above 0.01 Torr, removal of CO begins at 130 K (Ed = 10.6 kcal/mol) instead of near the desorption temperature of 400 K (Ed = 26 kcal/mol). The large decrease in CO desorption energy appears to be caused by substantial repulsive interactions in the compressed monolayer induced by coadsorbed hydrogen. The new low temperature CO desorption channel appears to be caused by displacement of the compressed CO adlayer by coadsorbed hydrogen. In addition, the desorption activation energy for the main desorption channel of CO near 400 K is lowered by ~ 1 kcal/mol for hydrogen pressures in the 0.001 to 0.1 Torr range. These new results clearly emphasize the importance of in-situ methods capable of performing kinetic experiments at high pressures on well characterized adsorbed monolayers on single crystal surfaces. High coverages of coadsorbed hydrogen resulting from substantial overpressures may substantially modify desorption activation energies and thus coverages and kinetic pathways available even for strongly chemisorbed species. These phenomena may play an important role in surface reactions which occur at high pressure. | en_US |
dc.format.extent | 495186 bytes | |
dc.format.extent | 3118 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.language.iso | en_US | |
dc.publisher | Elsevier | en_US |
dc.title | Hydrogen-induced low temperature CO displacement from the Pt(111) surface | en_US |
dc.type | Article | en_US |
dc.rights.robots | IndexNoFollow | en_US |
dc.subject.hlbsecondlevel | Materials Science and Engineering | en_US |
dc.subject.hlbsecondlevel | Chemistry | en_US |
dc.subject.hlbsecondlevel | Chemical Engineering | en_US |
dc.subject.hlbsecondlevel | Biological Chemistry | en_US |
dc.subject.hlbtoplevel | Engineering | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.subject.hlbtoplevel | Health Sciences | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Chemistry, University of Michigan, Ann Arbor, MI 48109-1055, USA | en_US |
dc.contributor.affiliationother | Department of Chemistry and Biochemistry and Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80309-0216, USA | en_US |
dc.contributor.affiliationother | Exxon PRT, NSLS, Brookhaven National Laboratory, Upton, NY 11973, USA | en_US |
dc.contributor.affiliationother | Instrumentation Division, Brookhaven National Laboratory, Upton, NY 11973, USA | en_US |
dc.contributor.affiliationother | Department of Chemistry and Biochemistry and Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80309-0216, USA | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/28358/1/0000121.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1016/0039-6028(90)90467-M | en_US |
dc.identifier.source | Surface Science | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
Files in this item
Remediation of Harmful Language
The University of Michigan Library aims to describe library materials in a way that respects the people and communities who create, use, and are represented in our collections. Report harmful or offensive language in catalog records, finding aids, or elsewhere in our collections anonymously through our metadata feedback form. More information at Remediation of Harmful Language.
Accessibility
If you are unable to use this file in its current format, please select the Contact Us link and we can modify it to make it more accessible to you.